Improved vault-cover



UNITED 'STATES PATENTy OEEIcE.

FREDERICK FITZGERALD,OF CINCINNATI, OHIO.

IM PROVED VAULT-COVER.

Specification forming part of Letters Patent No. 58,240, dated September 25, 1866.

lo all whom it may concern:

Be it known that I, FREDERICK FITZGER- ALD, of Cincinnati, Hamilton county, Ohio, have invented anew and useful Improvement in Vault-Covers and I do hereby declare the following to be afull, clear, and exact description thereof', reference being had to the accompa-nyin gdrawin g, making part of this speciiication. v

This is an improvement in the cast-iron plates, which in the side pavements of cities are employed to close over or cover the sunk areas or vaults in frontof houses 5 and my invention consists in giving such plates `a form which more perfectly secures the desiderata'of strength, drainage, sure footing, and adequate protection to the lights.

The accompanying drawing represents in perspective a small portion or fragment of a cover embodying my invention.

ce represent a series of hexagonal openings, composing tiers or ranges separated by con cave channels or gutters, b. Y

The portions o, which intervene between the consecutive openings in the range, are formed convex or crowning, and are grooved diagonally, so as to be composed of a eongeries of pyramidal elevations.

The openings a may either be lled with glass or be left open. The red arrows show the directionof the watershed toward the street A vertical section of the cover, taken'parallel with the street, displays a series of corrugas tions, d. r

` The diagonally-scored or channeled swells or eminences o servethe purpose of completely conducting oft' the water into the gutters b, which in turn conduct it immediately to the pavement proper. The said eminences also serve to afford a sure foothold for the Wayfarer, and further serve to fend or guardthe lights from being worn, scratched, or fractured by the heels of persons walking over them, or by the wheels of trucks. They also, being con veX above and concave below, forni a component part of the corrugations before spoken of,

by which great stiffness and strength are secured to the plate. Iclaim herein as new and of my invention"- The vault-cover or sidewalk-plate, having the gutters 1 1, the diagonally-scored and convex eminences o, and corrugations d, as and for the purpose set forth.

In testimony of which invention I hereunto set my hand.

FREDERICKv FITZGERALD. 

